Question 1133422: The time is takes to build a skyscraper is proportional to its height and inversely proportional to the number of construction workers. If it takes 10 workers 2.5 years to build a 20 story building, how long will it take 40 workers to build a 60 story building?
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39617)   (Show Source):
You can put this solution on YOUR website! ----
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The time is takes to build a skyscraper is proportional to its height and inversely proportional to the number of construction workers.
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n, construction workers
x, time
h, height
k, proportionality constant
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If it takes 10 workers 2.5 years to build a 20 story building, how long will it take 40 workers to build a 60 story building?
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Use these to find value for k, and then ,.... continue and finish.
Answer by greenestamps(13200)  (Show Source):
You can put this solution on YOUR website!
(1) 40 workers instead of 10: divide the amount of time by 4
(2) 60 stories instead of 20: multiply the amount of time by 3
ANSWER: 2.5 years, times 3, divided by 4
You can do the calculation
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